California Code, Streets and Highways Code - SHC § 2006.1

Notwithstanding Section 2006 or Section 2006.5, the board of supervisors of any county may abolish the office of road commissioner if the board transfers all duties of the road commissioner to the county director of transportation.  The director of transportation shall not be required to have any special permit, registration, or license.  Any civil engineering functions which are required to be performed by the road commissioner shall be performed by a registered civil engineer acting under the authority of the director of transportation.